1. The Behavior of Interest Rates
chapter 5
The Behavior of Interest Rates

2. Determinants of Asset Demand

3. Derivation of Bond Demand Curve
(F – P)
i = RETe = P
Point A:
P = $950
($1000 – $950)
i = = = 5.3%
$950
Bd = $100 billion

4. Derivation of Bond Demand Curve
Point B:
P = $900
($1000 – $900)
i = = = 11.1%
$900
Bd = $200 billion
Point C: P = $850 i = 17.6% Bd = $300 billion
Point D: P = $800 i = 25.0% Bd = $400 billion
Point E: P = $750 i = 33.0% Bd = $500 billion
Demand Curve is Bd in Figure 1 which connects points A, B, C, D, E.
Has usual downward slope

5. Derivation of Bond Supply Curve
Point F: P = $750 i = 33.0% Bs = $100 billion
Point G: P = $800 i = 25.0% Bs = $200 billion
Point C: P = $850 i = 17.6% Bs = $300 billion
Point H: P = $900 i = 11.1% Bs = $400 billion
Point I: P = $950 i = 5.3% Bs = $500 billion
Supply Curve is Bs that connects points F, G, C, H, I, and has upward slope

6. Supply and Demand Analysis of the Bond Market
Market Equilibrium
1. Occurs when Bd = Bs, at P* = $850, i* = 17.6%
2. When P = $950, i = 5.3%, Bs > Bd (excess supply): P  to P*, i to i*
3. When P = $750, i = 33.0, Bd > Bs (excess demand): P  to P*, i  to i*

7. Loanable Funds Terminology
1. Demand for bonds = supply of loanable funds
2. Supply of bonds = demand for loanable funds

8. Shifts in the Bond Demand Curve

9. Factors that Shift the Bond Demand Curve:
1. Wealth
A. Economy , wealth , Bd , Bd shifts out to right
2. Expected Return
A. i  in future, RETe for long-term bonds , Bd shifts out to right
B. e , Relative RETe , Bd shifts out to right
3. Risk
A. Risk of bonds , Bd , Bd shifts out to right
B. Risk of other assets , Bd , Bd shifts out to right
4. Liquidity
A. Liquidity of Bonds , Bd , Bd shifts out to right
B. Liquidity of other assets , Bd , Bd shifts out to right

10. Factors that Shift Demand Curve for Bonds

11. Shifts in the Bond Supply Curve
1. Profitability of Investment Opportunities
Business cycle expansion, investment opportunities , Bs , Bs shifts out to right
2. Expected Inflation
e , Bs , Bs shifts out to right
3. Government Activities
Deficits , Bs , Bs shifts out to right

12. Factors that Shift Supply Curve for Bonds

13. Changes in e: the Fisher Effect
If e 
1. Relative RETe , Bd shifts in to left
2. Bs , Bs shifts out to right
3. P , i 

14. Evidence on the Fisher Effect in the United States

15. Business Cycle Expansion
1. Wealth , Bd , Bd shifts out to right
2. Investment , Bs , Bs shifts right
3. If Bs shifts more than Bd then P , i 

16. Evidence on Business Cycles and Interest Rates

17. Response to a Low Savings Rate

18. Relation of Liquidity Preference Framework to Loanable Funds
Keynes’s Major Assumption
Two Categories of Assets in Wealth
Money
Bonds
1. Thus: Ms + Bs = Wealth
2. Budget Constraint: Bd + Md = Wealth
3. Therefore: Ms + Bs = Bd + Md
4. Subtracting Md and Bs from both sides:
Ms – Md = Bd – Bs
Money Market Equilibrium
5. Occurs when Md = Ms
6. Then Md – Ms = 0 which implies that Bd – Bs = 0, so that Bd = Bs and bond market is also in equilibrium

19. 1. Equating supply and demand for bonds as in loanable funds framework is equivalent to equating supply and demand for money as in liquidity preference framework
2. Two frameworks are closely linked, but differ in practice because liquidity preference assumes only two assets, money and bonds, and ignores effects from changes in expected returns on real assets

20. Liquidity Preference Analysis
Derivation of Demand Curve
1. Keynes assumed money has i = 0
2. As i , relative RETe on money  (equivalently, opportunity cost of money )  Md 
3. Demand curve for money has usual downward slope
Derivation of Supply curve
1. Assume that central bank controls Ms and it is a fixed amount
2. Ms curve is vertical line
Market Equilibrium
1. Occurs when Md = Ms, at i* = 15%
2. If i = 25%, Ms > Md (excess supply): Price of bonds , i  to i* = 15%
3. If i =5%, Md > Ms (excess demand): Price of bonds , i to i* = 15%

21. Money Market Equilibrium

22. Rise in Income or the Price Level
1. Income , Md , Md shifts out to right
2. Ms unchanged
3 i* rises from i1 to i2

23. Rise in Money Supply 1. Ms , Ms shifts out to right 2. Md unchanged
3. i* falls from i1 to i2

24. Factors that Shift Money Demand and Supply Curves

25. Money and Interest Rates
Effects of money on interest rates
1. Liquidity Effect
Ms , Ms shifts right, i 
2. Income Effect
Ms , Income , Md , Md shifts right, i 
3. Price Level Effect
Ms , Price level , Md , Md shifts right, i 
4. Expected Inflation Effect
Ms , e , Bd , Bs , Fisher effect, i 
Effect of higher rate of money growth on interest rates is ambiguous
1. Because income, price level and expected inflation effects work
in opposite direction of liquidity effect

26. Does Higher Money Growth Lower Interest Rates?

27. Evidence on Money Growth and Interest Rates